Aerial photomosaic of John Day Reservoir, 1966

Frequently-anticipated questions:

• What does this data set describe?
  1. How should this data set be cited?
  2. What geographic area does the data set cover?
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
  5. What is the general form of this data set?
  6. How does the data set represent geographic features?
  7. How does the data set describe geographic features?
• Who produced the data set?
  1. Who are the originators of the data set?
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
• Why was the data set created?
• How was the data set created?
  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
• How reliable are the data; what problems remain in the data set?
  1. How well have the observations been checked?
  2. How accurate are the geographic locations?
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
  5. How consistent are the relationships among the data, including topology?
• How can someone get a copy of the data set?
  1. Are there legal restrictions on access or use of the data?
  2. Who distributes the data?
  3. What's the catalog number I need to order this data set?
  4. What legal disclaimers am I supposed to read?
  5. How can I download or order the data?
• Who wrote the metadata?

Title: Aerial photomosaic of John Day Reservoir, 1966

Abstract:

A two-week field operation was conducted in the John Day Reservoir on the Columbia River to image the floor of the pool, to measure the distribution and thickness of post-impoundment sediment, and to verify these geophysical data with video photography and bottom sediment samples. The field program was a cooperative effort between the USGS Coastal and Marine Geology Team of the Geologic Division and the USGS Columbia River Research Laboratory of the Biological Resources Division. The data collection was completed aboard the R/V ESTERO during September 13-27, 2000. The interest in sediment accumulation in the reservoir was two-fold. First, it was unknown how effective this reservoir was as a sediment trap to material that otherwise would have been transported down-river to the estuary and eventually to the ocean. The recent erosion of beaches along the Washington coast has been attributed to a decreased contribution of sediment from the Columbia River to the coastal system due to the damming of the river. Second, sediment accumulation on the floors of reservoirs along the Columbia River has been suggested to be diminishing salmon spawning grounds. The extent of changes in habitat since construction of the John Day Dam, however, had not been documented. Common data sets were needed to address both of these questions, and for these reasons this geophysical and sampling program was undertaken.

1. How should this data set be cited?

   Cross, VeeAnn A. , and Twichell, David C. , 2004, Aerial photomosaic of John Day Reservoir, 1966:.

   This is part of the following larger work.

   Cross, VeeAnn A. , and Twichell, David C. , 2004, Geophysical, Sedimentologic, and Photographic Data from the John Day Reservoir, Washington and Oregon: Data Archive and Preliminary Discussion: Open-File Report 2004-1014, U.S. Geological Survey, Woods Hole Science Center, Woods Hole, MA.

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -120.75

   East_Bounding_Coordinate: -119.25

   North_Bounding_Coordinate: 46

   South_Bounding_Coordinate: 45.5

3. What does it look like?

4. Does the data set describe conditions during a particular time period?

   Calendar_Date: 1966

   Currentness_Reference: ground condition

5. What is the general form of this data set?

   Geospatial_Data_Presentation_Form: raster digital data

6. How does the data set represent geographic features?
   1. How are geographic features stored in the data set?

      This is a Raster data set.

   2. What coordinate system is used to represent geographic features?

      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.000018024676. Longitudes are given to the nearest 0.000022279724. Latitude and longitude values are specified in Decimal degrees.

      The horizontal datum used is North American Datum of 1983.
      The ellipsoid used is Geodetic Reference System 80.
      The semi-major axis of the ellipsoid used is 6378137.000000.
      The flattening of the ellipsoid used is 1/298.257222.
      

7. How does the data set describe geographic features?

   Entity_and_Attribute_Overview: The pixel value is grayscale color code.

   Entity_and_Attribute_Detail_Citation: None.

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   • VeeAnn A. Cross
   • David C. Twichell

2. Who also contributed to the data set?

   Appropriate credit should be given to the USGS, Upper Midwest Environmental Sciences Center, for the original mosaicking of the images.

3. To whom should users address questions about the data?

   VeeAnn A. Cross
   U.S. Geological Survey
   Marine Geologist
   384 Woods Hole Rd.
   Woods Hole, MA 02543-1598
   

   (508) 548-8700 x2251 (voice)
   (508) 457-2310 (FAX)
   vatnipp@usgs.gov
   

This data set was originally created for the John Day Reservoir Decision Support System by the Biological Resources Division in Cook, Washington. These data are provided here as basemap information indicating pre-impoundment features in John Day Reservoir.

1. From what previous works were the data drawn?

   (source 1 of 1)

   Columbia River Research Laborat, Western Fisheries Research Center, Biol, 1999, A Digital Atlas for John Day Reservoir: Biological Resources Division, U.S. Geological Survey, Cook, WA.

   Type_of_Source_Media: CD-ROM

   Source_Contribution:

   The original sources from which this data set was derived are orthophotographs of John Day Reservoir taken in 1966. The USGS, Upper Midwest Environmental Sciences Center, digitized the photographs, resampled the images at 6 ft horizontal resolution, and mosaiced them into one image. The image has been converted to MrSid format (.sid). The original photographs were borrowed from the USFWS, Portland, OR.

2. How were the data generated, processed, and modified?

   Date: 01-Jul-1999 (process 1 of 4)

   WARNING: THIS IS NOT THE OFFICIAL METADATA RECORD FOR THE SOURCE DATA, but merely describes from where the source data set was acquired and any post-processing that may have been done by the USGS/BRD/CRRL. The original sources from which this data set was derived are orthophotographs of John Day Reservoir taken in 1966. The USGS, Upper Midwest Environmental Sciences Center, digitized the photographs, resampled the images at 6 ft horizontal resolution, and mosaiced them into one image. The image has been converted to MrSid format (.sid). The original photographs were borrowed from the USFWS, Portland, OR.

   Person who carried out this activity:
   

   David E. Rupp
   U.S. Geological Survey, Biological Resources
   Interdisciplinary Hydrologist
   5501-A Cook-Underwood Rd
   Cook, Washington 98605
   USA
   

   509 538 2299 (voice)
   509 538 2843 (FAX)
   David_Rupp@usgs.gov
   

   Hours_of_Service: 8:00 a.m. to 4:00 p.m. Monday Through Friday

   Date: 2000 (process 2 of 4)

   The original Mr. Sid image was exported to a GeoTiff image using MrSid GeoViewer version 2.1

   Person who carried out this activity:
   

   VeeAnn A. Cross
   U.S. Geological Survey
   Marine Geologist
   384 Woods Hole Rd.
   Woods Hole, MA 02543-1598
   

   (508) 548-8700 x2251 (voice)
   (508) 457-2310 (FAX)
   vatnipp@usgs.gov
   

   Date: 2000 (process 3 of 4)

   The GeoTIFF image was then reprojected to geographic, NAD83 using BlueMarble Geographic Transformer.

   Person who carried out this activity:
   

   VeeAnn A. Cross
   U.S. Geological Survey
   Marine Geologist
   384 Woods Hole Rd.
   Woods Hole, MA 02543-1598
   

   (508) 548-8700 x2251 (voice)
   (508) 457-2310 (FAX)
   vatnipp@usgs.gov
   

   Date: 2000 (process 4 of 4)

   The reprojected image was then compressed to a MrSid image using LizardTech's MrSid Geospatial Encoder version 1.4.

   Person who carried out this activity:
   

   VeeAnn A. Cross
   U.S. Geological Survey
   Marine Geologist
   384 Woods Hole Rd.
   Woods Hole, MA 02543-1598
   

   (508) 548-8700 x2251 (voice)
   (508) 457-2310 (FAX)
   vatnipp@usgs.gov
   

1. How well have the observations been checked?

   No report

2. How accurate are the geographic locations?

   No report.

3. How accurate are the heights or depths?

4. Where are the gaps in the data? What is missing?

   Coverage of the John Day reservoir is complete.

5. How consistent are the relationships among the observations, including topology?

   No report

Are there legal restrictions on access or use of the data?

Access_Constraints: None

Use_Constraints: None

1. Who distributes the data set? (Distributor 1 of 1)

   VeeAnn A. Cross
   U.S. Geological Survey
   Marine Geologist
   384 Woods Hole Rd.
   Woods Hole, MA 02543-1598
   

   (508) 548-8700 x2251 (voice)
   (508) 457-2310 (FAX)
   vatnipp@usgs.gov
   

2. What's the catalog number I need to order this data set?

3. What legal disclaimers am I supposed to read?

   Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the accuracy or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. This disclaimer applies both to individual use of the data and aggregate use with other data. It is strongly recommended that these data are directly acquired from a U.S. Geological Survey server, and not indirectly through other sources which may have changed the data in some way. It is also strongly recommended that careful attention be paid to the contents of the metadata file associated with these data. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and/or contained herein.

4. How can I download or order the data?
   • Availability in digital form:

     Data format:	MRSID

   • Cost to order the data:

Dates:

Last modified: 15-Jan-2004

Metadata author:

VeeAnn A. Cross
U.S. Geological Survey
Marine Geologist
384 Woods Hole Rd.
Woods Hole, MA 02543-1598

(508) 548-8700 x2251 (voice)
(508) 457-2310 (FAX)
vatnipp@usgs.gov

Metadata standard:

NBII Content Standard for National Biological Information Infrastructure Metadata (FGDC-STD-001-1998)